Meguiar's Ultimate Snow Foam can be used as either a pre-wash soak or a main washing solution that ensures a more effective clean. The intense foam clings while gently loosening road grime for a touchless pressure rinse on lightly dirty cars, lubricating the surface when a wash mitt is required for dirtier vehicles. The super thick foam provides an extremely long dwell time that gives users more time to remove dirt, road grime, and other contaminants from the vehicle’s surface easily. The product is meant to be utilized with a foam cannon and pressure washer. Using this combination produces lots of high-cling, long-lasting foam, adding lubrication to the vehicle’s surface.